Sen. Dan Sullivan, R-Alaska, is chairman of the board of directors for International Republican Institute. Microsoft said the think tank was targeted by Strontium, also referred to as “Fancy Bear,” which is associated with Russian intelligence. (Tom Williams/CQ Roll Call file photo)

Microsoft announced late Monday that it thwarted a spearphishing attack against the U.S. Senate by a group affiliated with Russian intelligence.

In a statement, the tech giant said its digital crimes unit “executed a court order to disrupt and transfer control of six internet domains created by a group widely associated with the Russian government.”

Former Sens. Kelly Ayotte and Mark S. Kirk, former Republican presidential nominee and and Utah Senate candidate Mitt Romney, and former national security adviser Gen. H.R. McMaster are also board members.

“To be clear, we currently have no evidence these domains were used in any successful attacks before [Microsoft’s Digital Crimes Unit] transferred control of them, nor do we have evidence to indicate the identity of the ultimate targets of any planned attack involving these domains,” the statement said.

Microsoft said it informed the two think tanks and both responded quickly.

“Taken together, this pattern mirrors the type of activity we saw prior to the 2016 election in the United States and the 2017 election in France,” Microsoft said in its statement, which was written on a blog on its website by its president, Brad Smith.

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